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Hydraulic control and inside and outside biaxial compression packer

A packer, two-way technology, used in sealing/packing, wellbore/well components, earthwork drilling, etc. The effect of simplifying operation procedures and water injection strings, meeting well flushing requirements and reducing operation risks

Active Publication Date: 2017-05-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hydraulically controlled internal and external two-way compression packer, which solves the problems of unreliable flow separation between internal and external pipes, unsmooth backwash well, cumbersome construction procedures and short service life of pipe strings in the prior art

Method used

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  • Hydraulic control and inside and outside biaxial compression packer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The outer setting mechanism includes an outer rubber cylinder 11, an outer piston 9, and an outer support sleeve 10. The outer piston 9 and the outer rubber sleeve 11 are sequentially sleeved on the outer wall of the outer support sleeve 10 from top to bottom, and the outer The piston and the outer rubber tube are in axial contact, and the outer wall of the upper end of the outer piston is connected to the upper connecting sleeve 5 , and the upper connecting sleeve is temporarily fixed with the upper joint 1 by the upper shear pin 4 . The upper joint is provided with a separate upper hydraulic channel 3 that penetrates up and down and communicates with the outer piston. An outer adjustment ring 14 is arranged between the lower end of the outer rubber tube and the bridging joint 15. A central pipe 8 is arranged inside the outer support sleeve. The upper end of the central pipe is connected to the upper joint 1, and the middle passage leading to the inner set...

Embodiment 2

[0023] Embodiment 2: On the basis of Embodiment 1, the upper end of the inner rubber tube is connected to the piston in a stepped end face, and the lower end of the inner rubber tube and the upper end of the adjustment ring are also connected in a stepped end face. The inner wall of the inner piston is provided with an inner ring limiter, and the lower end of the central tube is fixed on the inner ring limiter. There can be multiple outer rubber tubes with outer spacer rings 12 arranged between them, and multiple inner rubber tubes with inner spacer rings 23 set with each other.

[0024] In short, in the present invention, the upper joint 2 is provided with a pressure transmission hole 1 and an upper hydraulic passage 3, the inside of the upper joint is threaded with the central pipe 8, the outer part of the upper joint is threaded with the upper connecting sleeve 5, and the upper joint The sleeve is threadedly connected with the outer piston 9, the outer support sleeve 10 is ...

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Abstract

The invention discloses a hydraulic control and inside and outside biaxial compression packer. The packer comprises an external setting mechanism and an internal setting mechanism. The upper end of the external setting mechanism is connected to an upper contact, and the lower end of the external setting mechanism is connected to the internal setting mechanism through a bridging contact. The lower end of the internal setting mechanism is connected to a lower contact. Ground pressure can be transmitted to the external setting mechanism and the internal setting mechanism through a pressure transmission hole and a hydraulic channel of a hydraulic controlled system during the pressurizing process of a ground control system. When a certain pressure is reached and after piston movement, a shear pin is cut, and a rubber sleeve is compressed till the internal and external rubber sleeves block the internal and external annular spaces to achieve the purpose of layering. A large-discharge-capacity inverse well-flushing requirement can be met when pressure relief of the ground control system is conducted and the rubber sleeve is rebounded. The hydraulic control and inside and outside biaxial compression packer solves the problems in the prior art that diversion of inner and outer pipes is not reliable, inverse well-flushing is not smooth, construction procedures are complex, and the service life of tubular columns is short.

Description

technical field [0001] The invention relates to downhole plugging tools; in particular, it is a hydraulic control type internal and external two-way compression packer. Background technique [0002] The concentric double-tube process technology can accurately adjust the water injection volume on the ground, and the process is simple and can effectively increase production. However, with the development of Chengdao Oilfield in the middle and late stages, especially with the development of high-temperature and high-pressure wells in the Dongying Formation and highly-inclined wells in the Guantao Formation, the current double-pipe technology is unsuitable, mainly as follows: Sealed diverters and sealing plugs are constrained by well deviation restrictions, high bottomhole pressure, and high temperature in application, resulting in improper sealing plugs and unreliable delamination of inner and outer pipes. [0003] Fine and long-life water injection puts forward higher require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/128E21B33/126
Inventor 任从坤谷开昭刘红兰李德忠聂文龙曲晓峰安百新魏新晨周景彩许玲玲
Owner CHINA PETROLEUM & CHEM CORP
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